1245972 has 72 divisors (see below), whose sum is σ = 3664416. Its totient is φ = 326592.

The previous prime is 1245971. The next prime is 1245973. The reversal of 1245972 is 2795421.

It is an interprime number because it is at equal distance from previous prime (1245971) and next prime (1245973).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7563 + ... + 7725.

2^1245972 is an apocalyptic number.

1245972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1832208).

1245972 is an abundant number, since it is smaller than the sum of its proper divisors (2418444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245972 is a wasteful number, since it uses less digits than its factorization.

1245972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 188 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 1245972 is about 1116.2311588555. The cubic root of 1245972 is about 107.6059024876.

The spelling of 1245972 in words is "one million, two hundred forty-five thousand, nine hundred seventy-two".